Elektrobit Wireless Communications Oy

Bittium Wireless Oy

Timo Hongell

Johanna Vartiainen

Isameldin Mohammed Suliman

Ari Tenhunen

Pasi Maliniemi

Tuula Johanna Vartiainen

A transmitter of a cognitive radio comprises a selector for selecting from a memory a channel which is determined free, for a power measurement. A power meter measures the received power from the selected channel. Detection selector compares the measured power and a power of the same channel saved in the memory and selects the channel for detection if the power in the channel is within a predetermined range from the power saved in the memory. A detector performs detection of the channel as a response to the selection for detection. A channel selector selects the channel for communication if the channel is detected unoccupied on the basis of detection. The transmitter communicates in the channel as a response to the selection for communication.

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Oulu, Finland

Timo Hongell